I have found that when I try to log in to iCloud it tells me my MobileMe account is already configured, but none of the iCloud features work. If I try to turn on Photo Stream, it just turns itself back off.
I am not 100% certain as to why that is, but it's annoying. Of course, everything else makes up for it.

I am also wondering this, I had to create a new Apple ID just to use iCloud because my current @me address would not work. Any ideas? Now my CC and iTunes / App store purchases are on one ID and my iCloud stuff is on another. Lame!

the one question that I have is about icloud and itunes
can you have a different icloud email than what is on the itunes store account and it handles syncing well?
and then how does it handle two icloud accounts talking to the same itunes store account? Such as when you buy a song does it sync based on the icloud account of the that purchased it or the itunes store account that purchased it?

This is random, but all I have to say is this iOS looks really amazing and I can't wait for it to be released...but...fall? That just really sucks! I really hope that the next iPhone is amazing if they didn't release it this summer. A 4S, with this iOS just won't cut it in my opinion.

Can anyone tell me, does iOs 5 set time and date support Internet time servers on no-n3G devices (iPod Touch, Wi-Fi iPad)? Or is there at least an API available for developers (at lest)?
This is a big part of cutting the cord, especially as the clocks on both my iPod and iPad run really fast. Pain to manually set them and syncing to the Mac only resets them when they are really far off actual time.

If you turn on LED notification, does it blink the LED flash continuously when there is an outstanding alert?
Also, if there is an alert that comes up when using the phone, then you lock it, does it show on the lock screen? I heard only new alerts when the phone is locked shows up on the lock screen.

Things only show up on the lock screen if they happened while it was locked. But at least they still show up in the notification center. They still don't have a snooze button on calendar entries. The iPhone must be the only devices ever made that doesn't have a snooze button. Come on apple, stop being so stubborn.

Great stuff. Mostly impresses by location based reminders and happy for week view in iCal.
Im a technical person but I still feel like I would be able to take advantage of the iCloud. I feel like they really show it off for people with multiple iOS devices.
I have a iMac at home but I'm not sure if I'll feel the full effect of using iCloud.

The "cloud" is only truly advantageous if you have a multiple devices, work on multiple devices. Obviously, gadget bloggers think cloud stuff is the greatest thing since the Prometheus brought fire down from the clouds, but for the larger population of folks who have one computer and one satellite gadget, which has got to be the vast majority, not so much.
Cable sync will still be 10x faster and infinitely more energy efficient than wireless/cloud sync. But if you have multiple devices: a desktop, a laptop, an iPhone, an iPad, the cloud can be beneficial.

All I can say is that the iPhone 4 is already too thin, but thats just my ooiinpn, making it thinner just seems a little stupid to me to make it any thinner, which is why my iPhone 4 has an otterbox case on it to make it bigger.

Can you assign colors to your calendars or does iOS automatically does it for you again? I'm sick of having the colors change each time I set up a new device. (and between various devices). Please Please Please be fixed in this version. I can't wait for another year...

SOMEONE PLS TEST THIS:
Can iPhone iCal send calendar/event invites to others from a non-.me.com iCloud acct?
Example: 2 people with calendars syncing to iCloud on non-.me.com (say iTunes accts with gmail addresses) accounts. Is there an option to send event invites to one another?
Alternatively, how does calendar sharing work?

Has anyone tried Mail, Pages etc with a bluetooth keyboard yet and if so is it better supported in iOS5?
Currently when using the keyboard it doesn't do auto contractions (dont to don't, hes to he's etc) and it also will not auto capitalise the beginning of a new sentence following a full stop.
A lot of shortcuts are also missing so can someone have a look around to see if there are any improvements here.
thanks
S